Hans leffler



'(No Model.) I

H. LEFFLER.

APPARATUS FOR UTILIZING HEAT 0F GASES 0F COMBUSTION. ,884. Y 51 Patented Jan. 22. 1895.'

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* UNITED STATES PATENT OFFICE.

HANS LEFFLER, OF GIEBIOHENSTEIN, GERMANY.

APPARATUS FOR UTILIZING HEAT OF GASES OF COMBUSTION.

SPECIFICATION forming part of Letters Patent No. 532,884, dated January 22,1895.

Application filed March 16,1894.

To all whom it may concern.-

Be it known that I, HANS LEEFLER, a subject of the King of Prussia, German Emperor, residing at Giebichenstein, near Halle-on-the Saale, Kingdom of Prussia, Germany, have invented a certain new and useful Improvement in Apparatus for Utilizing the Heat of the Gases of Combustion, of which the following is a specification.

This invention relates to an improved apparains for utilizing the heat absorbed by the gases of combustion in boilers and other heat generators.

By my invention the gases of combustion will not be caused to pass through the purifying liquid by means of a pressure, but by means of a vacuum. The purifying liquid is subsequently freed from the pulverous materials by a filter, so that it may be used as feed water for the steam boiler.

The accompanying drawing represents an elevation, partly in section, of my improved apparatus. 7

The gases of combustion which escape from the flues a, of a steam boiler 19, enter the lower part of a closed receptacle or receiver 0. Within this receiver is contained a series of horizontal baffle-plates 0', arranged to break line, so that the gases are caused to move in a zig-zag course. The gases of combustion are drawn upward by means of a ventilator d, the suction pipe d, of which enters the upper end of the receiver.

Above the receiver 0, is placed a tank 6, from which water flows through pipe 6', into the receiver and over the horizontal baffleplates 0'.

Serial No. 503,836. (No model.)

The Water heated to a certain extent and charged with the pulverous materials passes through tube f into a filter g. From the latter, the pure but hot water flows through a pipe h, to the feed apparatus i, of the steam boiler b. I I

It will be seen that by my invention the pulverous materials admixed with the gases of combustion are removedfrom these gases before the latter pass to the ventilator. Fur thermore this passage is effected after the gases have been cooled, and thus it will be possible to make use of a proportionatelysmall ventilator, while its wear and tear is diminished, as the excessive heating by means of the gases of combustion is obviated. 

